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Henstra, Anne M; Sipma, Jan; Rinzema, Arjen; Stams, Alfons JM (2007). "Microbiology of synthesis gas fermentation for biofuel production". Current Opinion in Biotechnology. Energy biotechnology / Environmental biotechnology. 18 (3): 200–206. doi:10.1016/j.copbio.2007.03.008. ISSN0958-1669. PMID17399976.